[OpenAFS] Anyone got a howto on tuning for a high latency network?

Assarsson, Emil Emil.Assarsson@sonyericsson.com
Mon, 20 Dec 2010 16:33:33 +0100


Hi,

I'm struggling with performance issues on a 300ms network link. Do anyone g=
ot a suggestion on how to tune this to its best?
We have wan accelerators but they do nothing for UDP packages. Currently it=
 takes 7 minutes to transfer a 34M file :-/

I have tried to adjust udpsize and rxpck on the server and chunksize on the=
 client. I can see ACK packages with out of sequence and wide gaps of time =
in the conversation when I analyze it in wireshark.



Best regards

Emil Assarsson
Sony Ericsson Mobile Communications AB

"The information in this email, and attachment(s) thereto, is strictly conf=
idential and may be legally privileged. It is intended solely for the named=
 recipient(s), and access to this e-mail, or any attachment(s) thereto, by =
anyone else is unauthorized. Violations hereof may result in legal actions.=
 Any attachment(s) to this e-mail has been checked for viruses, but please =
rely on your own virus-checker and procedures. If you contact us by e-mail,=
 we will store your name and address to facilitate communications in the ma=
tter concerned. If you do not consent to us storing your name and address f=
or above stated purpose, please notify the sender promptly. Also, if you ar=
e not the intended recipient please inform the sender by replying to this t=
ransmission, and delete the e-mail, its attachment(s), and any copies of it=
 without, disclosing it."